- Take a numerical safari with Numbers: A Silly Slider Book, the second book in Accord"s Silly Slider Book series. Designed especially for beginning counters, Numbers teaches youngsters how to count from one enormous elephant to ten sparkly dragonflies, with a whole zoo-full of critters on the pages in between. As young counters move the sliders, they"ll learn to count-and spell from one to ten. Each page presents a featured numeral and a host of number-specific critters. And, with just one slip of a slider, both the numeral and its spelling are suddenly revealed. Magical!